Tube clamp



FIG. 1 is a top, front, and right side perspective view of a tube clamp, showing my new design;

FIG. 2 is a top plan view thereof, on a larger scale;

FIG. 3 is a front elevational view thereof, on a still larger scale;

FIG. 4 is a bottom plan view thereof, on a large scale;

FIG. 5 is a rear elevational view thereof, on a smaller scale;

FIG. 6 is a left side elevational view thereof, on a small scale;

FIG. 7 is a right side elevational view thereof, on a larger scale; and,

FIG. 8 is a top, front, and left side perspective view thereof, showing my new design in an open configuration on a small scale. 

CLAIM The ornamental design for a tube clamp, as shown and described. 